Form shaping device for woodworking machines



1934- J. o. CREEK ET AL FORM SHAPING DEVICE FOR WOODWORKING MACHINESFiled March 24, 1933 Julian/01 5' Juhn U. Urea/1 [z/al[ yMK Er MaudPatented Nov. 20, 1934 FORM SHAIING DEVICE FO woon- I WORKING MACHINESJohn Oliver Creek and Walter Wood, Hamilton Ontario, Canada 5Application March 24, 1932, Serial No. 662,481

F 2 Claims.

Our invention relates to improvements in the production of the shaperforms as are used in machine wood working for the production of aplurality of similar pieces of work from a master pattern.

In general practice the wood worker takes the master pattern, clamps itupon a piece of board called the shaper form and then manually cuts awayone edge of the shaper form board until it conforms with the outline ofthe side face of the master pattern positioned thereabove. This is alengthy and tedious operation as the wood workor has, to be particularlycareful to make the edge of the shaper form of the exact formation ofthe side of the master pattern. When the wood worker has completed thisoperation, which is done by hand, the shaper form is then, ready for usein reproduction work, and in making the duplicate pieces of work heclamps a roughly formed piece of wood onto the shaper form in lieu ofthe master pattern and utilizes the formededge of the shaper form asa-guide in milling or shaping the face of the piece of wood inconformity therewith.

The object of our invention is to obviate hand work in forming the sideedge of the shaper form board and to do this we have provided a guidemember adapted to be used in conjunction with the rotary cutter of aspindle wood shaping machine wherein the face of the master patternmounted upon the shaper form can be brought to bear against the guidewhereby the cutter-head mills away the edge of the shaper form inconformity with theside face of the master pattern.

A still further and particular object of our invention is to provide ourguide, which is of stationary vertical cylindrical form, of a height atleast equal to the total face depth of the contacting side face of themaster pattern, and another object of our invention is to adjustablysecure the cylindrical guide upon a'bracket which is adapted to beattached to the table of a wood shaping machine.

Another object of our invention is to furnish a ring member adapted. tobe adjustably secured upon the cylindrical-guide for increasing thediameter thereof, which is necessary in certain types of reproductionwork as shall be hereinafter explained.

Our invention consists of a guide of the character set forth all ashereinafter more particularly described andillustrated in theaccompanying drawing in which: I

Fig. 1 is a perspective view of arotary cutterhead projecting upwardlyfrom the face, of a fragmentary portion of a shaper table in accordancewith standard practice, the standard type of guide ring being shown inconjunction therewith.

Fig. 2 is a similar figure to Fig. 1 showing the cutter-head partiallylowered throughthe orifice in the table, our guide member being shownpositioned thereabove.

Fig. 3 is a perspective view of a shaper form, showing the masterpattern clamped thereon, before the edge of the shaper formis cut awayto conform with the side face of the master pattern. Fig- 4' is aperspective view of a roughly shaped piece of wood before having itsside face shaped to conform with the side face of the master pattern. r

Fig. 5 is a vertical cross'se'ctional view through our cylindricalguidemember showing 'a detachable rin-g positioned on the lower portionthereof for use for certain classes of work, and

Fig. 6 is a side elevational view of the cutterhead as shown in Fig. .1wherein the blades there-' of are inclined for cutting a sloping face.

Like characters of reference indicate corresponding parts in thedifferent views in the drawing.

The standard type of spindle wood shaping machine comprises a fiat tabletop 1 upon which the work to be machinedis placed together with avertical cutter-head 2' projecting upwardly through an orifice 3 in thetop, the cutter-head being adjustable in height, that is, it can befully raised as shown in Fig. 1 or moved downwardly as shown in Figs. 2and-5. The standard type of machine is also provided with a ring 4adapted to be contained within the orifice 3 and having an upwardlyextending guidetcollar 5 of the same outer face diameter as the diameterof the path.

of rotation of the edgesof the cutter blades 6 carried uponthe head .2.The work to be cut or milled is clamped upona shaper form as illustrated3 and the shaper form moved across the surface of the table until theknives of the rotating cutter-head engage the work car-' ried thereon.In Fig. 3 we have shown the cut away or formed edge '7 of the shaperform, in the dotted lines, and it will be understood that when such edge7 is brought to bear against the guide collar 5 that the cutter-headwill mill the face of the piece of work into conformity with. theoutline of the edge '7.

As explained in thepreamble of our specification, the object of ourinvention is to provide a means whereby the edge 7 of the shaper formcan be-machine cut in conformity with the side face of the masterpattern.

To achieve, this object we provide a cylindrical guide. member8 of aheight'not less than the height of 1 the cutting face of the millingcutter head and ofthe same diameter as the diameter of the guide .collar5 andtherefore also of the same diameter 'as the diameter of thecuttingv path of the blades 6, and by the provision of an upwardlyextending bracket 9 mount the cylindrical guide 8 above the loweredcutter-head.

the reception of a lock screw 13 which extends through the slot and isthreaded into the orifice 14 in the cylinder 8. By, loosening the screw13 the cylinder can be moved relatively to the bracket through thedistance of length of the slot and if j it is desired to secure afurther adjustment we furnish a second threaded orifice 15 into whichthe locking screw '13 can be fitted. As the face'of-the bracket 'i-ncontact with the face of the cylinder 8' is curv'edto conform with theournature of the cylinder face asingle screw 13 will rigidly retain thecylinder in place;

' In using our guide a master'pattern such as indicated at 16 is clampedupon the shaper form board 1'7 in. any suitable manner such as by clamps18, the clamps being of any suitable type to rigidly hold the masterpattern in place against longitudinal movement and also to retain themaster pattern against rear movement when pressed against the cylinder8. The lower end of the cylinder 8 is positioned above the face of thetable 1 a slightly greater distance than'the thickness of the board 17and the cutter-head 2 is moved upwardly to a position just underneaththe bottom face of the cylinder 8. The machine isthen started torotate'the cutter-head and the edge portion 20 of theshaper form board17 pressed against the rotating knives 6 until the face 21 of the masterpattern makes contact with the face of the cylinder "8 and as the board1'7 is moved to and fro the edge portion 20 will be cut away inconformity with the'face 21 of the master pattern, as shown by thedotted lines in Fig.

3. It will be understood that the top cylinder- 8 is at least as high asthe highest point of the face 21 'of the master pattern. When the edgeof the shaped form has'been cut the master pattern is removed andtheshaper form is then ready for the reception "of arough cut piece of thematerialto be shaped, such as indicated by the numeral 30 in Fig. 4.

The bracket 9 and cylinder 8 are removed from the table and thefillerring 2 2'also removed;

The spindle '23 carrying the cutter-head is thenmoved to the uppermostposition above the face of the table and the cutter-head moved therefrom. The ring 4 with its guide collar 5 is then inserted into theorifice 3 in lieu of the ring 22 and the cutter-head 2 repositioned uponthe spindle above the guide collar 5 as illustrated in'Fig' 1. Themachine is then ready for reproduction work, wherein the face of thework clamped upon the shaper form is brought into contact with thecutter-head, and the formed edge '7 of theshaper form into contact withthe guide collar 5 y Intheshaping of certain pieces of'work -wherein one.or more of the faces is sloped upwardly and inwardly, as'for examplethe piece of work 24 illustrated in Fig. 6, in which the side 25 isinclined,we furnisha ring 26 which is adapted to be slid over thecylinder 8 and locked in its adjusted position by a set screw 27threadedtherethrough: e

the contour of theform.

to engage the cylinder. The ring is so positioned upon the cylinder thatit is engaged bythe inclined face 28 of the master pattern 29- when theedge of the shaper form is being cut. If the ring were not provided,onlythe lower edge of the inclined face of the master pattern wouldengage the cylinder, and this, of course, would possiblyinjure themaster pattern, render the operation hazardous to the wood worker, aswell as making it nearly impossible to achieve a true reproduction ofthe face outline upon the edge of the shaper form. 1

In the cutting of. the pieces of work from the master pattern, theblades 6 are adjusted upon the cutter-head so that they are angularlyinclined at thesame inclination as the face 28 of the masterpattern, asshown in Fig. 6, so that the correct face inclination is achieved aswell as the correct outline from the formed edge of the shaperform.

From the foregoing description it will be seen that we have provided asimple and yet very useful device by means of which the edges of shaperforms can be machine cut in accordance with a master pattern, andalthough we have shown our guide 8 of complete cylindrical form'it is tobe understood that it is not necessary to have the guide in the form ofa complete cylinder as long as there is sufficient face area to giveadequate contact when the shaper form is being cut, and therefore we donot limit our invention to the specific construction shown and describedbut may make such changes and alterations as we may at anytime deemnecessary without departing from the spirit of our invention as setforth in the ap pended claims.

What we claim as our invention is:

1. A wood working machine for finishing an irregularly shaped roughpiece comprising a table top having an opening therethrough, astationary guide detachably mounted above said opening, a rotary cutterpassing through said opening and extending above the top adjacent thebottom of the guide whereby'sa'id guide and cutter'will cooperate withan irregularly shaped master pattern and a board to produce ashaperform, an auxil iary attachment comprising a guide collar and a cutterthereabove replaceable in said opening upon removal of the'guide andfirst mentioned cutter, said collar'and cutter of the attachmentoperable to reproduce a face on said irregularly shaped rough piece fromthe shaper form.

2. A wood working machine for finishing an irregularly shaped roughpiece comprising a flat table'top having anopening therethrough, asubstantially cylindrical'guide having its lower edge spaced fromthetable and positioned above said opening, a rotary milling cutter passingthrough the opening into position adjacent the lower edge of the guidewhereby said guide and cutter will cooperate with an irregularly shapedmaster pattern and" a board to produce a shaper form, an annular guidecollar of a height corresponding to the thickness of the board adaptedto be posi-' tioned in and extending above said opening upon removal ofthe cylindrical guide said cutter being adapted to be repositioned withits lower edge adjacent the upper edge of the annular guide whereby saidirregularly shaped rough piece carried by the shaper form may bebrought-into position adjacent the annular collar and the cutter in itslast named position and a face thereof fashioned to

